How can I connect my checkboxes with Labels?

I have a problem again.

I have checkboxes . When I click it I am basically choosing it. As in the picture, when I choose the boxes in front of Label1 and Label2, and when I click "That's it" button I want my program to store these Labels in a set as a string.

My checkboxes's image

So I have my checkboxes if - else statement for marked or unmarked(pic 2). How can I make this real ?? Thanks.

Pic 2

var isChecked : Bool = false {
    didSet{
        if isChecked == true{
            self.setImage(checkedImage, forState: .Normal)
            checkedItemsSet.insert("itemsName") // I NEED TO DECLARE ITEMS NAME.
        }else {
            self.setImage(uncheckedImage, forState: .Normal)
        }
    }
}